RN1104,LF(CT Pre-Biased NPN Transistor Equivalent & Substitute Parts

Part Overview

The RN1104,LF(CT is an active pre-biased NPN bipolar junction transistor manufactured by Toshiba Semiconductor and Storage. This surface mount device operates at 50 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and is designed for general-purpose switching and amplification applications. The part is currently in active production status with 3731 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within established parameter tolerances.

Substiute Parts

RN1104,LF(CT

Toshiba Semiconductor and StorageIn Stock: 3803RN1104,LF(CT Datasheet

Current PartRFQ

SDTC144EET1G

onsemiIn Stock: 48300SDTC144EET1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN1104,LF(CT with the SDTC144EET1G is valid based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Transistor Type: Both are NPN pre-biased devices
• Maximum Collector Current (Ic): Both rated at 100 mA
• Collector-Emitter Breakdown Voltage: Both rated at 50 V
• Base Resistor (R1): Both 47 kOhms
• Emitter-Base Resistor (R2): Both 47 kOhms
• Minimum DC Current Gain (hFE): Both 80
• Collector Cutoff Current: Both 500 nA maximum
• Package / Case: Both SC-75, SOT-416
• Mounting Type: Both surface mount
• RoHS Compliance: Both ROHS3 compliant
• Moisture Sensitivity Level: Both MSL 1 (Unlimited)

The SDTC144EET1G operates within the established electrical envelope of the RN1104,LF(CT and maintains identical mechanical compatibility through standardized packaging. Both devices are active production components with established supply availability.

Parameter Comparison

Engineering Selection Recommendations

Both the RN1104,LF(CT and SDTC144EET1G are active production components with ROHS3 compliance and identical moisture sensitivity ratings. The SDTC144EET1G carries AEC-Q101 automotive qualification, which provides additional reliability assurance for applications requiring automotive-grade components. The SDTC144EET1G features a higher maximum power rating of 200 mW compared to the RN1104,LF(CT at 100 mW, offering enhanced thermal margin in power-dissipation-sensitive applications while maintaining all other electrical specifications within equivalent operating ranges.

Selection between these parts is determined by application requirements: the RN1104,LF(CT is suitable for standard industrial and consumer applications, while the SDTC144EET1G is specified for automotive and mission-critical applications requiring AEC-Q101 qualification.

Frequently Asked Questions (FAQ)

Q: Can the SDTC144EET1G directly replace the RN1104,LF(CT in existing designs?

A: Yes. Both devices share identical transistor type classification, maximum collector current, collector-emitter breakdown voltage, base and emitter-base resistor values, minimum DC current gain, collector cutoff current, and package configuration (SC-75, SOT-416). Pin-to-pin compatibility and electrical performance are equivalent within the specified parameter ranges.

Q: What is the significance of the higher power rating on the SDTC144EET1G?

A: The SDTC144EET1G is rated for 200 mW maximum power dissipation compared to 100 mW for the RN1104,LF(CT. This higher rating provides additional thermal headroom and allows operation in applications with greater power dissipation requirements without exceeding device limits.

Q: Are there packaging differences between these parts?

A: No. Both the RN1104,LF(CT and SDTC144EET1G use the SC-75, SOT-416 surface mount package with identical pin configuration and mechanical dimensions. No PCB layout modifications are required for substitution.

Q: What does AEC-Q101 qualification mean for the SDTC144EET1G?

A: AEC-Q101 is an automotive industry qualification standard that certifies the component for use in automotive applications. The SDTC144EET1G meets this qualification, making it suitable for automotive and high-reliability applications where such certification is required.

Q: Are both parts RoHS compliant?

A: Yes. Both the RN1104,LF(CT and SDTC144EET1G are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, indicating equivalent environmental and regulatory compliance.

Q: What are the DC current gain specifications for each part?

A: The RN1104,LF(CT specifies minimum DC current gain (hFE) of 80 at 10 mA collector current and 5 V collector-emitter voltage. The SDTC144EET1G specifies minimum DC current gain of 80 at 5 mA collector current and 10 V collector-emitter voltage. Both devices meet the 80 minimum hFE requirement under their respective test conditions.